Get a good home safe. Bolted down. One that will withstand the house burning down around it.
Best thing I ever bought. If you care about your watch boxes you'll need a pretty big one. Standard PAM and SE boxes are pretty big and take up a lot of space in the safe. If that's not important you can get by with a small one.
It's pretty ghetto but I put my watches in regular rotation in tube socks when I'm not wearing them to keep them from getting scratched from when I take them in and out of the safe.
My safe is about about 650lbs 5 feet tall and was a bitch to install in the base of my bedroom closet but all my watch related items stay in there and I feel good about it.
Matt aka "MattyMac"...on the Emerald Coast of Florida